CRYPTOCURRENCY
Metamask: How to disconnect metamask wallet from a dapp using web3?
Disable DAPP’s Metamask portfolio for web3.js
In this article, we look at how to turn off the Metamask portfolio from DAPP (decentralized application) using web3.JS. This is particularly useful when you have to make changes or changes to DAP without getting into the Metamask portfolio.
Understanding the basics
Before immersing yourself in a solution, we quickly look at some basic concepts:
* Web3.js : Popular JavaScript Library Interacting with Blockchain Ethereum.
* Metamask wallet : User’s controlled user interface for multiple cryptocurrency management with one device. It allows you to combine your wallet with different applications and services.
* DAPP (Distributed App) : SELF performance agreement with smart contracts that are often built on Blockchain Ethereum.
step by step solution
This allows you to turn off the Metamask portfolio from DAPP web3.js:
1. Installing the libraries required
First, make sure your project is installed web3.js and metamask Walet Web(if available).
Bash
NPM Install Web3 Metamask-Web-Aapi
Or if you use a thread:
`Bash
Thread adds web3 metamask-web-eap
2. Get the web3 expression
You need to get a web3 sample that must interact with the Ethereum block chain.
`Javascript
// Bring and platform Web3 Library
Const Web3 = Requirement (“Web3”);
Const providerurl = ” // Replace with Infura with Project ID
Const web3 = new web3 (new web3.providers.httpprovider (providersurl));
`
3. Turn off Metamask from DAPP
If you want to turn off the Metamask portfolio from DAPP, you need to send a “exclusive” message to Dapp. Here’s an example:
`Javascript
Const Handleclick = Async () => {
Try {
// Get a copy of the network and web3 supplier.
Const Web3 = Wait Getweb3 () …
// turn off the metamask portfolio from Dapp
Waiting for disconnectmamaskwallet (web3, “
} catch (error) {
Console.error (“Suspension of the error:”, error);
}
};
InConnectmetaskwallet function (web3, providerurl) {
Return the new promise ((decide, reject) => {
// Submit DAPP fire extinguishing message
Web3.eth.Sendransction ({
Posted by: “0x Your Your Metamask”,
to: “
Value: 1,
Gaslimit: 20000,
Gasprice: web3.utils.towei (“20”, “Gwei”),
NONCE: Web3.eth.gettranslationcount (“0x YY Metamaskin Address”)
}, (Error, result) => {
If (error) {
rejection (error);
} Else {
// Allow promise by a success message
to resolve ();
}
});
});
}
`
4.
Make sure you handle HandleClick properly.
`Javascript
// Take all the rejection errors and show the error message
catch (error) {
Console.error (“Error Medamask Stopping:”, Error);
}
`
conclusion
After these steps, you have successfully turned off the Metamask portfolio from DAPP using web3.JS. This approach allows for smooth interactions between the metamask and the Dapps portfolio without the required manual intervention or changes on both sides.
